Tiêu đề SSAC 111 Definitions_compressed.pdf ✅

16.Essential Minerals : Minerals which forms the chief constituent of rock and which are regarded as the characteristics component of rock are known as essential minerals. 17.Accessory Minerals : Mineral which occur only in small quantity and whose presence or absence is of no consequences as for the characteristics of rock is concerned are called as accessory minerals. 18.Soil formation : The transformation of rocks into soil may be termed as soil formation. 19.Soil Profile : A vertical section of soil which is showing all its horizon is called soil profile. Or The vertical section of the soil showing the various layers from the surface to unaffected parent material is known as soil profile. 20.Rock : A rock may be defined as an aggregate of one or more minerals. Or A naturally occurring hard mass of mineral matter formed after the solidification of two or rock forming minerals. 21.Igneous Rocks : Igneous rocks may be defined as the solidification of molten magma from the interior of the earth. 22.Sedimentary Rocks : The rocks formed from the consolidation of sediments accumulated through wind or water action at the surface of the earth is called as sedimentary rocks. 23.Metamorphic Rocks : When the change is considerable, the rock is said to have undergone metamorphosis and the new rock known as metamorphic rocks. 24.Soil formation : The transformation of rocks into soil may be termed as soil formation. 25.Soil Texture : The relative proportion of sand, silt and clay is called soil texture. Or The relative percentage of sand, silt and clay in soil is called as soil texture. 26.Soil Structure : The arrangement and organization of primary and secondary particles in a soil mass is known as soil structure. Or The arrangement of primary and secondary soil particles in a certain structural pattern. Or The manner in which the individual grains and aggregates are arranged in the soil mass is known as soil structure. 27.Pore Space : The empty space in soil not occupied by the soil solids is called pore space, and is filled with air or water. 28.Porosity of Soil : Porosity refers to percentage of soil volume which is occupied by pore spaces. 29.Soil Moisture Constant : The amount of water that contains at each of these equilibrium points is known as soil moisture constant. 30.Infiltration : The download entry or movement of water from the surface into soil. 31.Soil Colloids : The soil colloid is a material made of organic and inorganic particles less than 0.001 mm in diameter posses properties like typical colloidal substances are known as soil colloids. 32.Temperature : Degree of hotness.